chore(admin): Update build configuration and ignore analysis reports

- Add report.html files to .gitignore to exclude analysis reports from version control
- Update build time configuration to include milliseconds for unique timestamps
- Add explanatory comment for build time millisecond precision
- Regenerate bundle analysis report with updated build configuration

.gitignore

@@ -7,6 +7,10 @@ dist-ssr
 apps/*/dist
 packages/*/dist
 
+# --- 分析报告文件 ---
+report.html
+apps/*/report.html
+
 # --- 日志文件 ---
 logs
 *.log